I have a tip on removing a Yugo bolt pin:
1) Use hammer and punch to drive pin out as far as possible, in my case this was about a 1/8"
2) Place bolt in vice using a big socket from socket wrench set to hold retainer side of bolt (U shaped side) with the retainer in the middle open area of socket.
3)Then using your third hand place a correct sized star screwdriver bit into the recessed pin hold and turn your vice handle to tighten until the pin falls free.

Yugo pins are hard to get out sometimes. This trick worked after I pounded and soaked the bolt for days with no success. Also smooth the bolt pin before reinstalling so you donít have as much trouble if you need to remove it in the future.

I took my trigger assembly out for the second time (its been a few 1000 rounds I figured it was due and it was just as difficult to put on. But the first time helped me find some tricks to getting it on.